Sweden wants your trash

Only 4 percent of Swedish garbage ends up in a landfill, according to Swedish Waste Management. Due to its efficiency in converting waste to renewable energy, Sweden has recently begun importing around 800,000 tons of trash annually from other countries.

Sweden creates energy for around 250,000 homes and powers one-fifth of the district heating system, Swedish Waste Managements says. Its incineration plants offer a look into the future where countries could potentially make money off of their trash — and not just dump it in the ocean or bury it in mass landfills.